When bombs rained down on London during the Blitz, they fell on houses, on churches, and, less famously, on embankments along the River Thames. The damaged embankments could have sent devastating floods through London, but they didn't—thanks to a group of engineers who worked secretly and at night.
via Gizmodo http://ift.tt/13ADUu1 http://ift.tt/1GgKQeZ
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